EP 1143612 A1 20011010 - SURFACE ACOUSTIC WAVE DEVICE
Title (en)
SURFACE ACOUSTIC WAVE DEVICE
Title (de)
AKUSTISCHE OBERFLÄCHENWELLENANORDNUNG
Title (fr)
DISPOSITIF DE TRAITEMENT DES ONDES ACOUSTIQUES DE SURFACE
Publication
Application
Priority
- JP 0006703 W 20000928
- JP 29474899 A 19991018
Abstract (en)
There is provided an apparatus that shows a much better transmission function characteristic in a signal passing band, and a low insertion loss. A plurality of pairs of electrode fingers constitute a first split electrode group of 5a1, 5b1, 5a2, 5b2, 5a3, 5b3, .... Further, a plurality of pairs of electrode fingers constitute a second split electrode group of 6a1, 6b1, 6a2, 6b2, 6a3, 6b3, .... The pairs of electrode fingers of both the groups are interleaved. The pairs of electrode fingers include electrode fingers of a width narrower than lambda /8 ( lambda indicates the wavelength of a surface acoustic wave serving as the operation central frequency), and electrode fingers of a width wider than lambda /8, and the distance between the centers of the adjacent electrode fingers differs from lambda /4. <IMAGE>
IPC 1-7
IPC 8 full level
H03H 9/145 (2006.01)
CPC (source: EP KR US)
H03H 9/14505 (2013.01 - EP US); H03H 9/14552 (2013.01 - EP US); H03H 9/64 (2013.01 - KR)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1143612 A1 20011010; EP 1143612 A4 20041027; CN 1156965 C 20040707; CN 1338147 A 20020227; KR 100429474 B1 20040503; KR 20010093837 A 20011029; US 2001040421 A1 20011115; US 6580199 B2 20030617; WO 0131782 A1 20010503
DOCDB simple family (application)
EP 00962921 A 20000928; CN 00803024 A 20000928; JP 0006703 W 20000928; KR 20017007491 A 20010615; US 88171801 A 20010618